EP3090232A1 - Charge pyrotechnique retardatrice pour retardateurs militaires - Google Patents

Charge pyrotechnique retardatrice pour retardateurs militaires

Info

Publication number
EP3090232A1
EP3090232A1 EP14818989.7A EP14818989A EP3090232A1 EP 3090232 A1 EP3090232 A1 EP 3090232A1 EP 14818989 A EP14818989 A EP 14818989A EP 3090232 A1 EP3090232 A1 EP 3090232A1
Authority
EP
European Patent Office
Prior art keywords
weight
delay
pyrotechnic
mixture
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14818989.7A
Other languages
German (de)
English (en)
Other versions
EP3090232B1 (fr
Inventor
Helmut ZÖLLNER
Dirk FUNKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DynITEC GmbH
Original Assignee
DynITEC GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DynITEC GmbH filed Critical DynITEC GmbH
Publication of EP3090232A1 publication Critical patent/EP3090232A1/fr
Application granted granted Critical
Publication of EP3090232B1 publication Critical patent/EP3090232B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/10—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
    • C06B33/06—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being an inorganic oxygen-halogen salt
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C5/00—Fuses, e.g. fuse cords
    • C06C5/06—Fuse igniting means; Fuse connectors

Definitions

  • the invention relates to a pyrotechnic delay set military
  • Delay elements It is characterized by a flexible and easy setting of the burning speed over a wide range.
  • the delay rate only consists of raw materials that are currently not listed on the candidate list of Regulation (EC) No. 1907/2006 Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) ("REACH-compliant").
  • the triggering takes place via ignition chains, which can consist of several igniters.
  • the task of this ignition chain is to convert an external trigger pulse into a pyrotechnic reaction and to react the effective charge at the desired time. Often it is necessary to maintain a certain time interval between the external trigger and the reaction of the active charge. Since the times for external triggering and reaction of the active charge are generally fixed uninfluenced, within the ignition chain a so-called
  • Delay element to ensure the necessary time interval (delay time). This delay time can be between a few milliseconds and several seconds, depending on the application.
  • delay time can be between a few milliseconds and several seconds, depending on the application.
  • a typical embodiment of a delay element (also called ignition delay) is shown in Fig.1.
  • the ignition retarder (1) consists of a cylindrical
  • the cylindrical Metallrohrchen (2) and usually contains three pyrotechnic sets.
  • the cylindrical Metallrohrchen (2) is preferably made of steel, brass or aluminum.
  • On the input side there is the flame-sensitive Anakiungssatz (3), which is ignited by the upstream ignition and has the task to safely ignite the following usually less sensitive delay set (4).
  • On the output side after the delay set, there is the firing set (5) which ensures the transmission of the reaction to the following firing means.
  • the pyrotechnic reaction thus runs linearly through the ignition retarder. All sets are introduced by one or more parts loading and pressing processes in the metal body. From a design point of view of the ammunition, it is desirable to realize the different delay times with a fixed length of the ignition retarder.
  • the control of the delay time is preferably realized by the sentence composition. What is needed, therefore, is a delay set system that, by fine-tuning within its composition, allows adjustment of the desired delay time.
  • Pyrotechnic delay sets have been known for decades and are also used in civil blasting technology in so-called explosive detonators. They usually consist of a mixture of fuel and oxidant. Compared to civil applications, additional requirements are added when used in pyrotechnic ammunition.
  • the burn - through capability ie the reliable linear burnup of the
  • Delay set must be given over a wide temperature range (at least -54 ° C to +71 ° C).
  • the burning rate should ideally have no or only a small dependence on the temperature.
  • a high stability of the delay sets and compatibility with the contact materials is necessary to ensure the long service life between 12 and 20 years. During this period, the burning speed should not change.
  • Pyrotechnic delay sets can be prepared as a dry mixture of the starting materials or in a wet process with the addition of a binder as granules of the starting materials.
  • pyrotechnic delay sets are often used in ignition retarders for military applications, which on the one hand contain toxic substances and on the other hand have a comparatively clear temperature range of the burning time.
  • a typical representative of these delay kits is a system consisting of potassium perchlorate, lead chromate, antimony, and a suitable binder (e.g., nitrocellulose).
  • This delay phrase contains lead chromate, an SVHC substance (Substances of Very High Concern), which, according to Regulation (EC) No. 1907/2006 REACH, may no longer be used without authorization from May 2015.
  • the temperature response in the processed state in the ignition retarder is about 10 to 20% of the nominal value of
  • Delay time (temperature range: -54 ° C to +71 ° C). To increase the precision of the pyrotechnic ammunition a significant improvement is desirable here.
  • a pyrotechnic delay set with delay times of 0.5-5 s are contained in the mixture of the delay rate 5-15 parts by weight of potassium perchlorate and 85-95 parts by weight of a mixture of barium sulfate and silicon in a weight ratio between 6: 1 and 1: 3.
  • a pyrotechnic delay set with delay times of 0.1-0.5 s 20-70 parts by weight of manganese dioxide and 30-80 parts by weight of a mixture of barium sulfate and silicon in a weight ratio of between 2: 1 and 1: 4 are contained in the mixture of the delay set.
  • 0.1 to 3% by weight of a binder are included as a supplement in the mixture of the delay rate.
  • cellulose ethers (Tylose) are included as a supplement.
  • the pyrotechnic delay set contains in a preferred embodiment in the mixture of the delay rate 8-12% by weight of potassium perchlorate having a specific surface area of 0.2 ⁇ 0.05 m 2 / g, 40-50% by weight of barium sulfate having a specific surface area of 2.3 ⁇ 1, 0 m 2 / g, 40-50% by weight of silicon with a specific surface area of 1 - 6 m 2 / g and 0.2 - 1, 0% by weight of cellulose ethers.
  • a further preferred embodiment of the pyrotechnic delay set comprises 45-55% by weight of manganese dioxide having a specific surface area of 3.5 ⁇ 1, 0 m 2 / g, 15-25% by weight of barium sulfate having a specific surface area of 2.3 in the mixture of the delay rate ⁇ 1, 0 m 2 / g, 25-35% by weight of silicon with a specific surface area of 1-6 m 2 / g and 0.2-1.0% by weight of cellulose ethers.
  • the invention also relates to a retarding element which contains a pyrotechnic retardant set in the context of the compositions described above.
  • this delay set are possible by varying the proportions of potassium perchlorate (or manganese dioxide), barium sulfate and silicon and by varying the grain size of the raw materials used.
  • the adjustment of the delay time by varying the grain distribution of the silicon at a constant
  • Anzündverzögerers 1 to a cheek charge 3, a delay set 4 and a firing charge 5 are introduced.
  • the height of the set column thus formed is 19 mm in all cases.
  • the delay time is then defined as the time between
  • Fig. 2 shows the dependence of the reciprocal burning rate on the silicon content with different grain distributions (specific surface area: 5.3 m 2 / g (fine), 2.2 m 2 / g (medium); 1, 5 m 2 / g (coarse)) of the sentence mixture.
  • the proportion of potassium perchlorate is kontant 5%, while the proportion of barium sulfate varies accordingly.
  • Burning rate can then be varied between 50 ms / mm and almost 500 ms / mm by changing the recipe proportions. For a typical length of the
  • Delay set distance in the ignition retarder of 10 mm corresponds to that
  • Figure 1 in longitudinal section the basic structure of a Anzündverzögerers (1) and Figure 2 - the reciprocal burning rate as a function of silicon content
  • Example 1 the silicon content in Example 1 consists of a trimodal
  • the desired good burn-through capability could be demonstrated by testing each 1000 ignition restraints. Based on 1000 error-free tests, the minimum reliability is 99.7% (confidence level 95%), which clearly exceeds the usual military requirements for such components of 99%.
  • the dependence of the burning time on the temperature was determined on the basis of the delay time in the ignition retarder in the temperature range between -54 ° C and +71 ° C. In the temperature range considered, it amounts to about 2-3%, based on the firing rate at room temperature, and is thus significantly below the value of about 10% in conventional batch systems (for example potassium perchlorate / lead chromate / antimony).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne une charge pyrotechnique retardatrice destinée à des retardateurs militaires. Le mélange de la charge retardatrice contient au moins 5 parties en poids de perchlorate de potassium ou de dioxyde de manganèse, au moins 10 parties en poids de sulfate de baryum et au moins 20 parties en poids de silicium.
EP14818989.7A 2014-01-03 2014-12-19 Charge pyrotechnique retardatrice pour retardateurs militaires Active EP3090232B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014000023 2014-01-03
PCT/EP2014/078759 WO2015101525A1 (fr) 2014-01-03 2014-12-19 Charge pyrotechnique retardatrice pour retardateurs militaires

Publications (2)

Publication Number Publication Date
EP3090232A1 true EP3090232A1 (fr) 2016-11-09
EP3090232B1 EP3090232B1 (fr) 2018-03-07

Family

ID=52146499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14818989.7A Active EP3090232B1 (fr) 2014-01-03 2014-12-19 Charge pyrotechnique retardatrice pour retardateurs militaires

Country Status (3)

Country Link
EP (1) EP3090232B1 (fr)
DE (1) DE102014018792A1 (fr)
WO (1) WO2015101525A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2340523C (fr) * 2001-03-09 2009-06-02 Orica Explosives Technology Pty Ltd. Compositions de retardement, et dispositifs de retardement de detonation utilisant ces compositions
CL2007002676A1 (es) * 2006-09-20 2008-02-22 African Explosives Ltd Proceso para producir composicion pirotecnica de retardo que comprende mezclar oxidante, combustible, surfactante y liquido para formar una pasta o suspension, secar la pasta o suspension para eliminar liquido y obtener un producto solido, tomar el p
WO2010068957A2 (fr) * 2008-12-09 2010-06-17 African Explosives Limited Composition pyrotechnique à combustion lente

Also Published As

Publication number Publication date
WO2015101525A1 (fr) 2015-07-09
DE102014018792A1 (de) 2015-07-09
EP3090232B1 (fr) 2018-03-07

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